Combined switch and fuse-plug.



P. MAGKINTOSH. COMBINED SWITCH AND FUSE PLUG.

APPLICATION FILED SEPT. 30, 1907.

Patented 'Nqv, 16, 190$ JAIL/ENTER THEDEHZEK ZL ICKZNTUSH.

is a sideelevation, partly in section, of a plugs removed.

preferably or on'rrn acres FREDERICK mnonmrosmfios SCHENECTADY; NewYank, as'smnon ro GENERAL ELECTRIC COMPANY, a conrona'rron or new YORK.

COMBINED SWITCH AND FU$E-PLUG.

specification of Letters Patent. I Application filed September 30, 190?.ficrial No. 395,112.

To all whom "it may concern:

Be it known that I, FREDERICK MAGKIN- 'rosn, a citizen of the UnitedStates, residing at, Schenectady, county of Schenectady, State of NewYork, have invented certain new and useful Improvements in CombinedSwitches and Fuse-Plugs,of which the following is a specification; r.This invention relates to mechanical cutouts, and its objectistoprovide a switch of the perpendicular-blade type carrying a fuse whichwill open the circuit automatically in case of" an overload. Variousstructures of this general nature have been heretofore proposed, but thenovel feature of my invention lies in the use of a (201111118?-cialscrew-threaded fuse-pin inserted in a suitable receptacleontheswltch-blade, and capable of easy removal and replacement in a.manner familiar toevery one accustomed to dealing with ordinary electriclighting circuits.

In the accompanying drawing, Figure 1 switch embodying my improvement,and Fig. 2 is a plan view of the same, showing a double pole switch withoneof the fuse 'lhe'base l is made. of suitable insulating materials,and supports one or more hin eclips 2 and contact. clips 3 each providedwith the usual bindingscrews 4: for the attaclnnent'of line terminals.In each hingeclip is pivoted a switch blade, comprising a hinge-portion5 and a contact-portion 6. In the case of a double-pole or triple-poleswitch, the several contact -portions 6 are united by a cross-bar 7 ofinsulation; carrying a handle 8. V

Rigidly secured to ,each portion of the blade is an arm 9 10 oneoverlapping the other. One of these arms as 9 supports a receptaclecomprising "a cup or socket 11 orcelain, containing a screwthreadedmetal lic shell-contact 12. The other arm as 10, projects into saidsocket through an opening-123- in its sideand is in contact with theshell 12, preferably by passing through an opening 14; in said shell andresting upon an internalflange at the bottom thereof. A plate 150%insulation is laid upon said arm 10, and a. screw 16 is passed downthrough a Washei:.17, the plate 15 and receptacle.

is screwed into the shell 12, making contact with the upper section, anda center contact Patented Nov. 16, 1909;

suitable holes in the arm 10 and the bottom of the receptacle, finallyentering a tapped hole in the arm 9. This screw therefore 56- cures allthese parts rigidly together, and it' also serves as the center-contactofthe -An ordinary screw-threaded fuse-plug 18 60 therewith and with thecenter-contact 16'and completing the electric circuit between the twoportions of the switch-blade; When the fuse in said plug is blown, it isa simple matter to unscrew the plug and insert a fresh one. Inasmuch asscrew-plug fuses are commonly used in domestic wiring and. in many otherinstallations carryingcom paratively small. currents, the advantages 0 aswitch of this kind are apparent.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is, l. A switcli-blade composed of twosec tions withtheir adjacent ends arranged to overlap, insulation interposedbetweensaid ends, means for rigidly clamping'said overlapping endstogetlier and plu contacts respectively connectei .to said on s.

2. A switch-blade composed of two sections with their adjacent endsarranged to overlap, an insulating socket having its bottom portioninterposed between saidoverlapping ends, a screw shell contact'with insaid insulating socket and in engagement bolt connected to the lowersection andee tending throu h the bottom of-the \ins'ula ing socketandoperating'to clamp thejsev-j cral parts together. i v 3. Aswitch-blade composed of two-=11" sulated portions overlapping eachother socket of insulation supported on one said portions,ascrew-threaded shell conta having'a flange interposed between thejotherof said-portions and the socket, zi -central screw contact securing-saidparts together,

and a fuse-plug screwed into said shell and making contactt-herewit-hand with said screw.

at. A switch-blade composedot a hinge portion and a contact-portion,anarin S. cured to each portion, a socket of insulationsupported on oneor said arms and having I an opening to permit the other arm to pro 1ccject into it, a screw threaded shell in said socket in contact with thearm therein, a spectively connected to said ends, and means centralscrew tapped into the socket sqpportfor rigidly uniting said partstoether. 10

i arm, 6, late of insulation between the In witness whereof, I haveereunto set head pf sai screw and the other arm; end I my hand this 28thday of Se tember 1907. 5 a fuserplug screwed into said shell. IFREDERICK :MA KIN TOSH.

I 5. A switch blade in two sections, insula- Witnesses:

;;tion; interposed between the adjacent ends MAR ARET E. WOOLLEY,

tl 1ereo f,' together -with plug contacts re- 7 HELEN ORFoRn;

